diff --git a/src/www/firewall_nat_out_edit.php b/src/www/firewall_nat_out_edit.php
index 26d927753..4e7677d32 100644
--- a/src/www/firewall_nat_out_edit.php
+++ b/src/www/firewall_nat_out_edit.php
@@ -155,12 +155,12 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     do_input_validation($pconfig, $reqdfields, $reqdfieldsn, $input_errors);
 
     if (in_array($pconfig['protocol'], explode(" ", "any tcp udp tcp/udp"))) {
-        if(!empty($pconfig['sourceport']) && !is_portoralias($pconfig['sourceport']))
+        if(!empty($pconfig['sourceport']) && !is_portrange($pconfig['sourceport']) && !is_portoralias($pconfig['sourceport'])) {
             $input_errors[] = gettext("You must supply either a valid port or port alias for the source port entry.");
-
-        if(!empty($pconfig['dstport']) && !is_portoralias($pconfig['dstport']))
+        }
+        if(!empty($pconfig['dstport']) && !is_portrange($pconfig['dstport']) && !is_portoralias($pconfig['dstport'])) {
             $input_errors[] = gettext("You must supply either a valid port or port alias for the destination port entry.");
-
+        }
         if (!empty($pconfig['natport']) && !is_port($pconfig['natport']) && empty($pconfig['nonat'])) {
             $input_errors[] = gettext("You must supply a valid port for the NAT port entry.");
         }